*{
    margin: 0;
    padding: 0;
}

.bj img{
    max-width: 100%;
    position: relative
}
.bj form{
    position: absolute;
    width: 320px;
    transform: translate(50%,50%);
    padding: 15px;
    box-sizing: border-box;
    border: 1px solid #ddd;
    border-radius: 8px;
    text-align: center;
    top: 30%;
    left: 20%;
    box-shadow: 0 0 20px rgba(0,0,0, 0.2);
}
input{
    width: 65%;
    height: 30px;
    font-size: 17px;
    padding: 0 10px;
    box-sizing: border-box;
    margin-bottom: 15px;
}
button {
    width: 60%;
    height: 40px;
    background-color: cornflowerblue;
    color: #fff;
    font-size: 16px;
    border: none;
    border-radius: 6px;
    margin: 10px 0;
}
#dl li{
    display: inline-block;/*在同一行显示*/
    list-style: none;/*取消实心原点*/
    background-color: #b7b7b7;
    font-size: 22px;
    width: 41%;

}
.bj #dl{
    position: relative;
}
.bj #zc{
    float: right;
}
